Complementary surface confined polymer electrochromic materials, systems, and methods of fabrication therefor
US5457564A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1993 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Apr 5, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Electrochromic device having electrode surface confined complementary polymer electrochromic materials, and materials, systems and methods of fabrication therefore. The electrochromic devices employ a polypyrrole-prussian blue composite material on the oxiatively coloring electrode, and a heteroaromatic substance containing at least one quaternized nitrogen atom group on the reductively coloring electrode. A bilayer material consisting substantially of metallic oxide which is conductive in at least one of its redox states and electroplated with a polymer is also disclosed for use as an electrochromic material on either the oxidatively colored or reductively colored electrodes. A method for electrodeposition of viologen polymers at a substantially neutral pH is also disclosed. A method for self-powering and self-modulating electrochromic devices by means of photovoltaic cells is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.